Investigations of the spectral sensitivity of long period gratings fabricated in three-layered optical fiber

Thomas D.P. Allsop*, David J. Webb, Ian Bennion

*Corresponding author for this work

Research output: Contribution to journalArticle


Long period gratings (LPGs) were written into a progressive three-layered (PTL) monomode optical fiber. The spectral sensitivity was experimentally measured with respect to temperature and the surrounding refractive index, and compared with theoretical predictions. The behavior of the devices suggests that this type of fiber may be useful as a means of reducing the sensitivity of LPGs to the surrounding medium and for simultaneous temperature and refractive index sensing.

Original languageEnglish
Pages (from-to)264-268
Number of pages5
JournalJournal of Lightwave Technology
Issue number1
Publication statusPublished - Jan 2003



  • long-period fiber gratings
  • optical fiber
  • optical fiber devices
  • refractive index measurement
  • temperature measurement

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